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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A326138 Numbers k such that A005187(k) < sigma(k) <= 2k, where A005187(k) = 2k - {binary weight of k}.

Table of values

n a(n)
1 6
2 28
3 110
4 496
5 884
6 8128
7 18632
8 85936
9 116624
10 391612
11 15370304
12 17619844
13 33550336
14 73995392
15 815634435
16 3915380170
17 5556840416
18 6800695312
19 8589869056
20 42783299288
21 80999455688
22 137438691328
23 217898810368
24 546409576448
25 1081071376208
26 1661355408388

List of values

[6, 28, 110, 496, 884, 8128, 18632, 85936, 116624, 391612, 15370304, 17619844, 33550336, 73995392, 815634435, 3915380170, 5556840416, 6800695312, 8589869056, 42783299288, 80999455688, 137438691328, 217898810368, 546409576448, 1081071376208, 1661355408388]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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